分类: Oracle
2008-11-03 11:05:22
如何启动或关闭的归档(ARCHIVELOG)
数据库可以运行在2种模式下:归档模式(archivelog)和非归档模式(noarchivelog)
归档模式可以提高Oracle数据库的可恢复性,生产数据库都应该运行在此模式下,归档模式应该和相应的备份策略相结合,只有归档模式没有相应的备份策略只会带来麻烦。
本文简单介绍如何启用和关闭数据库的归档模式。
1.shutdown normal或shutdown immediate关闭数据库
[oracle@jumper oracle]$ sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.4.0 - Production on Sat Oct 15 15:48:36 2005 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production With the Partitioning option JServer Release 9.2.0.4.0 - Production SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. |
SQL> startup mount; ORACLE instance started. Total System Global Area 101782828 bytes Fixed Size 451884 bytes Variable Size 37748736 bytes Database Buffers 62914560 bytes Redo Buffers 667648 bytes Database mounted. |
SQL>alter database archivelog;Database altered. SQL> alter database open; Database altered. SQL> archive log list; Database log modeArchive ModeAutomatic archival Enabled Archive destination /opt/oracle/oradata/conner/archive Oldest online log sequence 148 Next log sequence to archive 151 Current log sequence 151 |
SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started. Total System Global Area 101782828 bytes Fixed Size 451884 bytes Variable Size 37748736 bytes Database Buffers 62914560 bytes Redo Buffers 667648 bytes Database mounted. SQL>alter database noarchivelog;Database altered. SQL> alter database open; Database altered. SQL> archive log list; Database log modeNo Archive ModeAutomatic archival Enabled Archive destination /opt/oracle/oradata/conner/archive Oldest online log sequence 149 Current log sequence 152 |